------------[ cut here ]------------ WARNING: CPU: 1 PID: 8224 at include/linux/skbuff.h:2738 pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] WARNING: CPU: 1 PID: 8224 at include/linux/skbuff.h:2738 pskb_may_pull include/linux/skbuff.h:2754 [inline] WARNING: CPU: 1 PID: 8224 at include/linux/skbuff.h:2738 skb_ensure_writable+0x376/0x450 net/core/skbuff.c:6100 Modules linked in: CPU: 1 PID: 8224 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:pskb_may_pull_reason include/linux/skbuff.h:2738 [inline] RIP: 0010:pskb_may_pull include/linux/skbuff.h:2754 [inline] RIP: 0010:skb_ensure_writable+0x376/0x450 net/core/skbuff.c:6100 Code: d2 0f 85 b9 00 00 00 44 0f b7 63 7a 89 ef 44 89 e6 e8 0e 6f d7 f8 41 39 ec 0f 83 83 fd ff ff e9 61 ff ff ff e8 bb 74 d7 f8 90 <0f> 0b 90 e9 af fc ff ff e8 ad 74 d7 f8 44 89 e6 89 ef e8 e3 6e d7 RSP: 0018:ffffc90006d6f8f0 EFLAGS: 00010283 RAX: 0000000000001a0d RBX: ffff88801f15e8c0 RCX: ffffc900272f9000 RDX: 0000000000040000 RSI: ffffffff88b71b15 RDI: 0000000000000005 RBP: 00000000eb5d3131 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000eb5d3131 R11: 0000000000000001 R12: 00000000eb5d3131 R13: 0000000000000001 R14: ffff88801f15e934 R15: ffff88801f15e930 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ea3b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f742e028 CR3: 0000000029ffe000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bpf_try_make_writable net/core/filter.c:1668 [inline] bpf_try_make_writable net/core/filter.c:1674 [inline] ____bpf_skb_pull_data net/core/filter.c:1865 [inline] bpf_skb_pull_data+0x45/0x280 net/core/filter.c:1854 bpf_prog_643fb1e587a79136+0x1d/0x1f bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x3df/0x9a0 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0xb42/0x1de0 net/bpf/test_run.c:1072 bpf_prog_test_run kernel/bpf/syscall.c:4292 [inline] __sys_bpf+0x1787/0x5830 kernel/bpf/syscall.c:5706 __do_sys_bpf kernel/bpf/syscall.c:5795 [inline] __se_sys_bpf kernel/bpf/syscall.c:5793 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5793 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72b1579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ea35ac EFLAGS: 00000292 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000020000080 RDX: 0000000000000050 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi